Pile-cutting machine



G. ROGER ET AL FILE CUTTING MACHINE Filed Jan. 22, 1924 2 Sheets-Sheet 1 AWE/woes HTTOR/VEV F" G. ROGER ET AL FILE CUTTING MACHINE Filed Jan. 22; 1924 2 Sheets-Sheet 2 ll ll-h-lhll fiTTOR/VEY Patented Dec. 2, 1924.

FICE.

GEORGE ROGER, OF WARRINGTON, AND GEORGE ROGER, JR., 016 HAVANNAH, NEAR CONGLETON, ENGLAND.

FILE-CUTTING MACHINE.

Application filed January 22, 1924. Serial No. 687,836.

To all whom it may concern:

Be it known that we, Gnonon ROGER and GEORGE ROGER, Junior, subjects of the King of Great Britain, residing, respectively, at 108 Wilderspool Causeway, Warrington, Lancashire, England, and Havannah, near Congleton, Cheshire, England, have invented certain new and useful Improvements in Pile-Cutting Machines, of which the following is a specification.

The invention relates to power driven machines employed in the cutting of the pile of pile fabrics, and to that class in which the movements of the machine are largely controlled by the cutting knife itself. That is to say, when the knife pierces the cloth, runs out of the race being cut, or otherwise moves from its correct cutting position, means are requisite to control the movement of the cloth or machine, whether for the purpose of stopping or starting the same, or for altering the movement referred to from that necessary for normal cutting operations.

In power machines of the kind herein mentioned, it is very important that the cloth running through the same be kept at a constant tension whether the machine is running at full normal speed or not, and also that any deviation from correct cutting conditions on the part of the cutting knife shall result in an immediate control of the speed of travel of the cloth. Loss of time in this regard, and want of sensitiveness to slight deviations referred to, have, in the past, been the cause of failure in the use of machines of the class named.

The object of our invention is to provide means whereby changes referred to may be rapidly and effectively brought about, with a constant tension of the cloth.

This object is accomplished with the use of a differential gear device, in combination with braking or retarding means in connection with and controlled by the cutting knife aforesaid.

With reference to the accompanying drawings, showing one form or arrangement of my invention, Fig.1 is a plan view of a machine of the character named and provided according to my said invention. Only so much detail mechanism is shown to make the arrangement clear.

Fig. 2 is a side elevation of Fig. 1.

Fig. 3 is a view partly in section of a detail in the foregoing views and at right angles thereto and on a larger scale.

a, a, is the framing of the machine, I) is the drag roller over or around which the cloth passes, and 0 is the driving roller also about which the cloth passes. A portion of the length of cloth is indicated at d. e is the driving pulley of the machine, where such is employed, and which may be connected by belting or gearing to a source of power. f is the driving shaft of themachine to which 6 is keyed or attached. This shaft is shown carrying a bevel wheel 9 of a differential gear device, a second bevel wheel therein and marked it being mounted on a shaft 2' passing across the machine, a brake drum 70 being attached to such shaft at the opposite end. A second pair of bevels m, n, are here shown, in gear with g and 72. respectively, thus forming a well known box of bevels. A casing 0 loosely mounted on shaft supports the bevels m, a, they being revolubly mounted therein, and the external part of said casing is provided in bevelwheel form at T, which gear wheel engages bevels s, 6, attached to shafts u, 4), respectively.

Shaft 12 is in gear with shaft 3/ carrying the cloth drag roller 7), through bevel gearmg w, w.

Similarly, shaft to isin bevel gear connection 2, p with the driving shaft Z carrying the cloth roller 0.

A slight difference of speed between the rollers b and o is normally provided for, as will be understood, and the tension of the cloth due to this speed ratio is kept constant.

In the present example, a brake drum 9 similar to la is provided on the shaft 'y carrying the drag roller 1), and a like drum could be provided additionally or alone with is on the shaft carrying the roller 0.

It is so arranged that breaking action takes place at is when the brake'is off at g, and vice versa.

A-brake shoe 1 for Z0. is pivoted on the machine at 2, and similarly a brake shoe 3 is pivoted at l, for 9. (Fig. 2;) Rods 5 passing through shoes 1 and 3 are provided with helical springs such as 6 abutting in each case against a bracket shown, tending to force the shoes onto the respective drums.

A lever 7, pivoted on a bracket at 8, bears as i against a bowl 9 revolubly mounted on shoe 1, and said lever at the part capable of being brought into contact with bowl 9 as it moves, is shaped so that a slight movement of said lever 7 will put a varying pressure upon bowl 9. For instance, as shown, the shoe 1 is forced upwards on its hinge or pivot at 2, but a flat part on the outer surface of lever 7 will, acting like a cam, enable the shoe named to be pulled down by spring 6 when the lever is moved to the left. A similar device is shown provided for shoe 3.

It will thus be seen that, if the lever such as 7 is arranged to press the shoe 1 up when the shoe 3 is down, then parallel or simultaneous movements of the levers provided will reverse these conditions, or raise shoe 3 and allow shoe 1 to be pulled dow The levers 7 are shown capable of operation in manner stated through attached and pivoted rod 10. j is a spring connecting rod 10 to frame a, and for returning said rod to its normal position.

It will readily be seen that, when the machine is stopped, or the braking action applied to drum g, the bevels g, h, m, n, are merely revolving on their respective axles, the speed ratio of the shafts f, i, being then 1 to 1. It is assumed that the driving pulley e is continuously running while ever the power is on.

But when the machine or cloth is running, variation in retardation of the movement of wheel h by reason of variable contact between shoe 1 and drum it will. variably affect the speed ratio above-mentioned, or the speed of the cloth. Thus slight movements of rod 10 may bring about differential variations in speed from maximum to no speed at all.

The movement of the rod 10 is controlled by the cutting knife, and may be connected thereto by any suitable known mechanism for the purpose. In the present instance, the rod 10 (Fig. 2) is capable of being moved by the operation of chains or flexible members indicated at 1 1, 15, attached to one end of said rod, and passing round revoluble pulleys indicated and mounted on frame at. The other ends of the chains are attached to the lower extended part of a hand lever 12, pivoted at 13 on a bracket on said frame a. By the arrangement shown, the movement of lever 12 in either direction will operate to move the rod 10 to the left, so that if the upright position of lever or handle 12 corresponds to the position when the machine is in motion, the movement named tends to reduce or stop the movement of machine and cloth in manner already indicated.

A rod connection 16 joins lever 12 with a depending arm 17, attached to revoluble shaft 18 carried in a framing 19 mounted on framing a. This shaft is provided with a projecting feather along its length between the framings 19.

A member 20 is carried at one end by this framing 19 by being mounted in wheel or pully connection with a shaft 21 on said framing. The lower part of mem er 20 is formed with two parallel projecting fixed bars 22, with a curved part at the upper edges. portion of a holder 2% of the cutting knife is shown, and provided with an attached cross piece 255. The blade of the knife is shown extending beyond the holder 2 l Vilhin the fixed bars parallel there with and loosely connected thereto by pins (such as at 27) in slots therein, are mov able bars 26.

The cross piece 25 of the knife holder extends across the curve 23, when in position. the bars 26 having slots indicated for receiving said cross piece.

Mounted on shaft 18 are depending arms 28 in key-way connection with the feather on said shaft, so that said arms can move longitudinally along the shaft, but turn therewith. The arms afoesaid are in pin and slot connection with the movable bars 26. It will thus be seen that movement of the knife and holder, forward or rearward, will, on account of engagement with the slots in bars 26, and on account of the connecting arms 28, shaft 18, lever 17, hand lever 12, rod 10 and levers 7, operate the shoes 1 and 8 for the purpose named. This actuation may occur when the knife runs out of the race o loops of pile, or forwards, or alternatively, when it meets an obstruction and is pushed backwards. In addition, the move ment of lever 12 may be controlled during cutting operations by the hand of the operator for regulating the speed of the cloth according to the condition of the cloth. or the manner in which the knife is cutting.

Said movement of the holder 2 1 referred to, will also cause the cross piece 25 to rise in the curve part 23, so that for an extreme movement in either direction the holder is thus pushed out of position for normal working, and the knife requires to be set in the race again. (in such occasion of e):- treme movement, the operation of the brake shoes named would result in the stopping of the machine or cloth.

We claim 1. 1n means whereby the movement of a power oriven machine employed inthe cutting of the pile of weft pile fabrics is controlled by the movement of a cutting knife therefor, a differential gear device in gear and, shaft connection with the clotl1clriving and drag rollers of the machine, and also in gear connection with the driving shaft therefor and with a controlled shaft on the opposite side of the gear to said driving shaft, a drum on said controlled shaft, 2. pivoted brake shoe capable of making and breaking contact with said drum, a cam device for operating said brake shoe, a movable member in pivotal connection with cam device, for operating the latter, and in operative connection with the knife holder, whereby movement of the latter will be transmitted to the cam device, for the purpose and in manner substantially as herein set forth.

2. In means whereby the movement of a power driven machine employed in the cut ting of the pile of weft pile fabrics is controlled by the movement of a cutting knife therefor, a differential gear device consisting of a box of bevels, one of the latter attached to the driving shaft of the machine, and another thereof attached to a controlled shaft across said machine, a casing for said bevels loosely mounted on said driving shaft and in gear and shaft connection with the cloth-dr1ving and drag rollers, a controlled shaft aforesaid across the machine, a drum attached to the opposite end of said shaft, a pivoted and spring controlled brake shoe for making and breaking contact with said drum, a pivoted lever bearing against an end part of said brake shoe, and opposite to the pivoted end of the latter, a shaped contacting end to said lever whereby the brake shoe may be moved to and from the drum as the said lever is moved on its pivot, a member or rod in pivotal connection with said lever and in flexible connection with a pivoted lever 0r handle, a connection to said handle from a depending member on aframe in which is mounted the knife and holder, a curved cavity at the upper edge of a projecting part of said frame, for receiving a cross bar attached to the knife holder, a movable and parallel portion within the projecting part of said frame, slotted to receive the cross bar aforesaid, braking means for a cloth roller of the machine, operated through the movement of the movable member before-named and in similar manner to the means described with reference to the drum on the controlled shaft, all for the purpose and in manner substantially as herein set forth.

In testimony whereof we jointly affix our signatures.

GEORGE ROGER. GEORGE ROGER, JUNIOR. 

